The LP2989 is a fixed-output 500 mA precision LDO regulator designed for use with ceramic output capacitors. Output noise can be reduced to 18µV (typical) by connecting an external 10 nF capacitor to the bypass pin. Using an optimized VIP™ (Vertically Integrated PNP) process, the LP2989 delivers superior performance.
The LP2989 is a fixed‑output 500 mA precision LDO regulator designed for use with ceramic output capacitors. It offers an ultra‑low dropout voltage, low output noise and a sleep mode current below 0.8 pA.
The device is available in several surface‑mount packages (SO‑8, Mini SO‑8, 8‑lead LLP) and supports a wide supply voltage range up to 16 V. Detailed electrical characteristics, ordering information and mechanical dimensions are provided in the following sections.
| Dropout Voltage | Typically 310 mV @ 500 mA load |
|---|---|
| Output Noise | 18 µV typical (with 10 nF bypass capacitor) |
| Sleep‑Mode Quiescent Current | < 0.8 pA |
| Output Voltage Accuracy | 0.75 % (A‑grade) |
| Maximum Supply Voltage | 16 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Continuous Output Current | 500 mA |
| Package Options | SO‑8, Mini SO‑8, 8‑lead LLP |
The typical dropout voltage is 310 mV at a 500 mA load.
In sleep mode the device draws less than 0.8 pA of quiescent current.
The regulator is offered in SO‑8, Mini SO‑8 and 8‑lead LLP packages.
The LP2989 can continuously supply up to 500 mA.